have a look here

http://www.macmod.com/content/view/173/0/

I used these in mine and I didn't have any problems at all. Plus, their price is hard to beat.
_________________________
"Fix it 'til it Breaks."

Jacob - EiC & Director of Technology
Mac Pro Quad 2.66 - 4GB RAM
160 GB SATA RAID 1 - 650 GB Storage
Quad 19" Widescreen LCDs
Accessorized to the Hilt